mixed metal adjustable ring

I believe it's a small, local business here in Toronto. It's a one-size, adjustable ring that mixes yellow gold and silver colours. It's an adjustable, one-size ring, but it's a little bit difficult to adjust, and I think the smallest you can go is probably around size 6 for this. Only worn once, since it is a little difficult for me to fit into. Paid $40+tax = $45.20, so I'm asking for a reasonable amount of $15, which includes the case, and the ring is still in like new condition since it was only used once. Also willing to trade this item.